Merchandise display base



FIG. 1 is a perspective view of a merchandise display base showing my new design;

FIG. 2 is a bottom perspective view thereof, here showing an exemplary caster in broken line for illustrative purposes only forming no part of the claimed design;

FIG. 3 is a reduced top plan view thereof;

FIG. 4 is a reduced left side elevational view thereof;

FIG. 5 is a reduced right side elevational view thereof;

FIG. 6 is a reduced rear side elevational view thereof; and

FIG. 7 is a reduced front side elevational view thereof; and,

FIG. 8 is a reduced bottom plan view thereof. 

The ornamental design for a merchandise display base, substantially as shown and described. 